Association between Degree of Dental Attrition and Prevalence of Non-carious Cervical Lesions in Present Day Human Teeth

The present study aimed to investigate the association between degree of dental attrition and the presence of non-carious cervical lesions (NCCLs) in 5807 present day human teeth. The degree of dental attrition was defined as either confined to the enamel (Level 1) or reaching the dentin (Level 2). In 12, 13, 14, 21, 23, 24, 26, 32, 34, 36, 44, 45, 46 and 47 (Federation Dentaire Internationale Two-Digit system), associations have been found between the degree of attrition and presence of NCCLs. Among these tooth types, the proportion of level 2 teeth was higher in teeth with NCCL than in those without, except for 23. A significant difference in the percentage of NCCLs was seen on the four surfaces (labial buccal, lingual, distal, mesial) between Levels 1 and 2, with a higher proportion of NCCLs on the lingual surface at Level 2. This study suggested an association between the degree of dental attrition and the presence of NCCLs.